All of the above, they can have a negative affect on your body and a positive affect, mainly a negative affect so, A.
Please note I can only make out some of this, so here's the answers I can see-
Answer #5:
Left atrium, right atrium, left ventricle, right ventricle.
Answer #10:
1.2-1.5 gallons.
Answer #8:
White blood cells fight and kill off diseases.
I'll add more as I get it
EDIT!
Answer #4:
They assist in clotting your blood
Answer #14:
O, B, A, AB.
I think this says that self esteem is a bigger issue in schools than it used to be. a lot of teens have a low self esteem due to bullying and teasing in school. most of the higher self esteem children are the ones who think they are better than everyone else and they usually end up having a bad attitude towards other people which causes them to have very few friends.
Food labels provide the amount of calories and what the food contains
